Preliminary exam CSAT April 08

1. When Vladimir Putin came to power in his first term as the President of Russia a leading political leader who opposed his policies died of mysterious illness in prison/captivity. Hardly any observers of the regime were surprised by this. A cartoonist  aptly depicted this situation by showing a policeman informing journalist, "We are trying figure out whether he committed suicide or died of illness."

Which of the conclusions can be drawn from the information given in the passage?